新型SRM直接转矩控制系统的场路耦合联合仿真

Field-Circuit Coupling Joint Simulation of Novel SRM Direct Torque Control System

转矩脉动是阻碍开关磁阻电机(SRM)发展的主要因素之一。采取合适的控制策略及结构改进能够抑制转矩脉动,但在研究的过程中通常需要通过仿真的方式进行快速验证。采用Simulink、Maxwell及Simplorer场路耦合多物理域联合仿真的方式,针对新型定转子开槽SRM,建立了直接转矩控制(DTC)系统,模拟分析了其在起动、加减速以及增卸负载等工况下的响应性能,验证了对转矩脉动的抑制效果。对于新型定转子开槽SRM本体建模而言,利用Maxwell建立其有限元模型,可以避免复杂的数学模型推导,且在联合仿真的过程中能够实时反映出电机内部的电磁特性,便于为电机本体结构的改进以及控制策略的优化设计提供重要依据。

Torque pulsation is a main factor that hinders the development of switched reluctance motors(SRMs).Adopting the appropriate control strategy and structural improvement can suppress torque pulsation,but this method usually needs to be verified quickly by simulation in the process of research.A method of field-circuit coupling multi physical domain joint simulation of Simulink,Maxwell and Simplorer is proposed,and a direct torque control(DTC)system for a novel stator/rotor slotted SRM is established.The response performance under different operation conditions such as starting,acceleration,deceleration,load increase and load reduction is simulated and analyzed,and the suppression effect of torque ripple is verified.Maxwell is used to establish the finite element model of novel stator/rotor slotted SRM,which can avoid complex mathematical model derivation,and can reflect the electromagnetic characteristics inside the motor in real time during the process of joint simulation.This simulation modeling and analyzing method is convenient to provide an important basis for the optimum design of SRM and its control strategies.